fix(openapi): pass isRequired to parameter enum fields in playground (#3038)

.changeset/fix-parameter-enum-required.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-openapi': patch
+---
+
+Pass `isRequired` to `FieldSet` for parameter enum fields in playground, fixing required enum parameters incorrectly showing an "Unset" option.

packages/openapi/src/playground/client.tsx

@@ -402,6 +402,7 @@ function FormBody({ parameters = [], body }: Pick<PlaygroundClientProps, 'parame
                 name={field.name}
                 fieldName={fieldName}
                 field={schema}
+                isRequired={field.required}
               />
             );
           })}